Figure 6
From: High resolution propagation-based lung imaging at clinically relevant X-ray dose levels
Iodine k-edge subtraction imaging (KES). (a) Shows a representative cross-section through a scan (33 keV) of a pig lung injected with different concentrations of iodine/agarose gel mixes. The white arrows point to vessels filled with the contrast agent. Differences in iodine concentration can not be observed. (b) CT scan of a phantom with known iodine concentrations (overlaid in pseudo-color), from which an iodine concentration calibration function was retrieved (color bar right). (c) The Subtraction image of two scans at 33.5 and 33 keV demonstrates a high specificity for iodine, which in turn allows to quantify difference in the iodine concentration. (d) Quantification of the iodine concentrations (color coded) using the calibration function (b).
